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A master's thesis from Aalborg University
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Investigation of Dual Three-Phase IPMSM

Translated title

Investigation of Dual Three-Phase IPMSM: Analyzing PWM Strategies' Impact on Common Mode Voltage Reduction

Authors

;

Term

4. term

Education

Energy Engineering, Master

Publication year

2024

Submitted on

Pages

88

Abstract

This thesis examines controlling a DTP machine (a type of electric machine) with a dual inverter to reduce common-mode (CM) voltage. The machine parameters are validated using finite element analysis (FEA) and experimental measurements. The machine is operated with field-oriented control (FOC) in Simulink and on a test bench, and the model and operation are confirmed by comparing simulated and measured results. Three pulse-width modulation (PWM) schemes are explored: space vector modulation (SVM), interleaved SVM, and zero common-mode voltage (ZCMV). ZCMV shows a theoretical elimination of CM voltage. When dead time (a short delay added to inverter switching) is included in the simulation, pulses appear that depend on the dead-time duration. Future work will implement the three strategies experimentally to verify whether CM voltage reduction is achieved on the physical machine using ZCMV.

Denne afhandling undersøger styring af en DTP-maskine (en type elektrisk maskine) med to omformere for at reducere fællesmodspænding (common-mode, CM). Maskinens parametre valideres med finite element-analyse (FEA) og eksperimentelle målinger. Maskinen køres med feltorienteret styring (FOC) i Simulink og på en testbænk, og modellen og driften bekræftes ved at sammenligne simulerede og målte resultater. Tre PWM-strategier (pulsbreddemodulation) undersøges: space vector modulation (SVM), interleaved SVM og zero common-mode voltage (ZCMV). ZCMV viser teoretisk eliminering af CM-spænding. Når dødtid (en kort forsinkelse i omformerens switchning) indføres i simuleringen, opstår der pulser, som afhænger af dødtidens varighed. Fremtidigt arbejde omfatter at implementere de tre strategier eksperimentelt for at verificere, om CM-spændingsreduktionen også opnås på den fysiske maskine med ZCMV.

[This apstract has been rewritten with the help of AI based on the project's original abstract]

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